package com.example.demo4.controller;

import com.sun.applet2.AppletParameters;
import java.util.HashMap;
import java.util.Map;

/**
 * @description: TODO
 * @author: Sarah
 * @modified By: Sarah
 * @date: Created in 2021/7/29 17:25
 * @version:v1.0
 */
public class Demo {


    Map<Integer,Integer> map = new HashMap<>();

    public static void main(String[] args) {
        Map<Integer,Integer> map = new HashMap<>();
        map.put(1,2);
        map.put(2,3);
        map.get(1,2);

    }

}
